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1．This is my grandpa. he’s an erhu player now. He was a doctor before. He helped lots of people.
2．They sell many different things here. You can buy food, clothes, toys, bags and books.
3．It’s cool. The leaves fall from the tree. I can play with the fallen (落下的) leaves. And I can have a picnic with my friends.
4．My bag is white. It’s big. But it’s not heavy. I can carry it over my shoulder.
5．It was my cousin’s birthday last Saturday. I sent him some story books. He likes them very much.
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
